Yeah, the bumpers and flares will fit right on. You'll have to drill holes in your fender arches to hold the screws (or rivets) for the flares.

The skirts need a little work because the later Cabriolets had a bigger rocker panel than the early Rabbits. The shape of the skirts is fine on them, its just the points where you should put the clips aren't there. You can make brackets to hold them on using an angled piece of metal and some screws.

I've always liked this car, the wheels aren't my taste, but the rest is killer: